CT-1 Certificate of Analysis

Certified Reference Material: Tungsten Ore

Printable version of the certificate. (PDF, 672.95 kb)

CT-1 is a sample of a scheelite ore obtained in 1973 from Canada Tungsten Corporation, Tungsten, N.W.T. The principal mineral constituents are: 40% pyroxene, 18% quartz, 12% pyrrhotite, 10% amphibole, 8% calcite, 5% mica, 2% each of feldspar and dolomite, and 1.6% scheelite.

Recommended Value and 95% Confidence Interval
Material Tungsten wt %
CT-1 1.04 ± 0.02

A certificate of analysis will be issued with each order of CT-1. CANMET Report 76-5, "Tungsten ores CT-1, BH-1 and TLG-1: Their characterization and preparation for use as certified reference materials", will be forwarded, free of charge, on request to the Coordinator, CCRMP.

Approximate Chemical Composition
Constituent wt %
W 1.04
Si 17.2
Al 2.9
Fe (total) 17.5
Ca 12.2
Mg 2.0
Na 0.2
K 0.7
Ti 0.2
Mn 0.7
Mo 0.03
C (total) 1.7
H2O+ (950/°C) 0.9
H2O- (105/°C) 0.5

For further information

555 Booth Street
Ottawa, ON, K1A 0G1

Telephone: (613) 995-4738
Facsimile: (613) 943-0573
Email: Contact CCRMP

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